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Self-interacting dark matter in cosmology: Accurate numerical implementation and observational constraints
(IOP Publishing, 2021-10)
This paper presents a systematic and accurate treatment of the evolution of cosmological perturbations in self-interacting dark matter models, for particles which decoupled from the primordial plasma while relativistic. ...
On the effects of the modification of the metric in the gravitational context
(2020)
This thesis consists of two parts: In the first one, simple generic extensions of isotropic Durgapal–Fuloria stars to the anisotropic domain were presented. These anisotropic solutions were obtained by guided minimal ...
Nonbaryonic dark matter and scalar field coupled with a transversal interaction plus decoupled radiation
(Springer, 2013-04-17)
We analyze a universe filled with interacting dark matter, a scalar field accommodated as dark radiation along with dark energy plus a decoupled radiation term within the framework of the spatially flat Friedmann-Robertson-Walker ...
Self Interactions in Warm Dark Matter: A View from Cosmological Perturbation Theory
(SP MAIK Nauka/Interperiodica, 2021-10)
We provide a short overview into Self Interacting Warm Dark Matter (SI-WDM) models from the context of Cosmological Perturbation Theory (CPT). The aim is to generalize conventional Cold DM models, by proposing a more general ...
Sharing but not caring: dark matter and the baryon asymmetry of the universe
(Iop Publishing Ltd, 2016-09-01)
We consider scenarios where Dark Matter (DM) particles carry baryon and/or lepton numbers, which can be defined if there exist operators connecting the dark to the visible sector. As a result, the DM fields become intimately ...
The evolution of the cosmic microwave background temperature Measurements of T(CMB) at high redshift from carbon monoxide excitation
(EDP SCIENCES S A,, 2011-02)
A milestone of modern cosmology was the prediction and serendipitous discovery of the cosmic microwave background (CMB), the radiation leftover after decoupling from matter in the early evolutionary stages of the Universe. ...
Trans-Planckian problem in the healthy extension of Horava-Lifshitz gravity
(AMER PHYSICAL SOCCOLLEGE PK, 2012)
Planck scale physics may influence the evolution of cosmological fluctuations in the early stages of cosmological evolution. Because of the quasiexponential redshifting, which occurs during an inflationary period, the ...